New competition bid source

[ZanCorDX]

📝 Summary

The whole pipeline has been updated to use BlockBid (all bids seen in all relays) instead CompetitionBid (single best bid to beat).
This change gives more information to the bidding service and implies that the SlotBidder is now just a UnfinishedBlockBuildingSink and the BiddingService gets all the bids by implemening BlockBidWithStatsObs

pub trait BlockBidWithStatsObs: Send + Sync {
    /// Be careful, we don't assume any kind of filtering here so bid may contain our own bids.
    fn update_new_bid(&self, bid_with_stats: BlockBidWithStats);
}

and is his responsibility to let the active bidders know about the competition bids.
The rbuilder now connects to the bid-scraper to get those BlockBid.
Some other changes:

• ethers replaced by alloy
• Some refactoring on crates/rbuilder/src/live_builder/config.rs to simplify the creation of other cfgs.
• Some lint cleaning.

💡 Motivation and Context

Get rid of any external dependency to get competition bids.

✅ I have completed the following steps:

• Run make lint
• Run make test
• Added tests (if applicable)